基于Matlab系统函数法的汽车轮胎力计算研究

针对轮胎力在汽车动力学模拟及控制系统开发中的重要作用,研究了利用Matlab/Simulink软件中的系统函数来建立Gim理论轮胎模型的模块化实现方法,所建立的轮胎模块在车辆动力学模拟中可直接作为Simulink中的子模块被调用来计算地面作用于汽车轮胎的纵向与横向力。通过动力学数值仿真与实验测试结果的对比分析表明:Gim理论轮胎模型具有很高的精度,能准确的预测轮胎的力学特性,所建立的轮胎子模块通用性强,所需参数少,可直接应用于各种车辆动力学分析与控制系统的研究中。

Calculation of Vehicle Tire Force Based on Matlab System Function

In view of the important role of tire force in the simulation of vehicle dynamics and the development of control system,the system-function in Matlab/Simulink software was used to establish the Gim theoretical tire model in this paper.The tire model was built in Simulink,and this tire module can be directly called as a sub-module of Simulink to calculate tire longitudinal and lateral force applied by ground.Finally,By the comparison between results of dynamics simulation and experiments,it indicates that the Gim theoretical tire model has high precision,and it can accurately predict the mechanical properties of the tire.The tire sub-module established has a wide applicability with few parameters and it can be directly applied to the analysis of vehicles dynamics and control system.